REPAIR FUEL CELL INNER LINER (Continued)

TM-55-1520-240-23-8 CH-47D Heilcopter Manual
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TM 55-1520-240-23-8 10-15 REPAIR FUEL CELL INNER LINER (Continued) 10-15 g. Apply a uniform coat of barrier cement (E63.3) (4) over previous coat of repair cement (2) to within no more than 1/4 inch of repair area of O.D. Use a brush (5). Remove any excess cement from unbuffed area. Use clean cloth (E120) dampened with MEK (E244). Wear gloves (E184.1). Allow barrier to dry to touch. h. Apply a second coat of barrier cement (E63.3) (6) over first barrier coat (4) at 90º to the application of first coat. Use a brush. Allow second coat to air dry for approximately 30 minutes. i. Prepare repair cement (E63.2) as in steps d and e. j. Carefully apply a thin uniform coat of cement mixture (7) over previous coats of barrier cement to within no more than 1/8 inch of O.D. of buffed edge area. Use a brush. Smooth surface with MEK (E244) and remove any excess cement from unbuffed area. Use clean cloth (E120) dampened with MEK (E244). Wear gloves (E184.1). Do not flex fuel cell in repair area. k. Allow finished repair to set for 1 hour before moving fuel cell. l. Allow finished repair to air cure for 24 hours at room temperature of 70ºF (33ºC) minimum before use. INSPECT FOLLOW-ON MAINTENANCE: Visually inspect repair for workmanship, no loose edges, no voids, cement fully cured. END OF TASK 10-59

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